Answer:
short-term memory
Step-by-step explanation:
The elephant is demonstrating a deficiency in short-term memory. This is because the elephant completely forgot about the current conversation that he was having with the bartender just a couple of seconds ago. Meaning that he is forgetting things happening in a short-time period after it happening. This occurs when the individual has short-term memory problems. That is why the elephant asks "What Problem?" since he forgot the entire conversation.